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Musician Gary Skaggs pedals and plays around San Francisco aboard his custom piano bike, St. Frankenstein. It took Skaggs two years to build the 320-pound three-wheeler out of an $80 junk piano and a heavy duty front loader tricycle. Since the piano bike’s completion in 2008, Skaggs has been taking it to the Embarcadero in San Francisco to perform for tips. He is able to play and pedal at the same time, though steering is particularly challenging and hills are a real hazard. For more on Skaggs and St. Frankenstein, see this post & video by Mike Kepka of the San Francisco Chronicle blog, The City Exposed.